is a free software
reimplementation or clone
of the Motif
computer programming toolkit.
LessTif is developed by the Hungry Programmers.
As opposed to Motif, which is distributed under a proprietary license that can require the payment of royalties, LessTif is distributed under the GNU Lesser General Public License (LGPL), a less restrictive, free software license. This makes LessTif more attractive to many developers, distributors and users. The licence of Motif was the main motivation for the development of LessTif.
LessTif aims for full source and binary compatibility with Motif. While this has not yet been achieved, many Motif applications run with LessTif and/or can be compiled with it.
After the release of Open Motif there is now a second alternative to replace Motif. However, Open Motif itself is not free software, so the development of LessTif continues.